Physics Letters B (Aug 2024)
Suppressed electric quadrupole collectivity in 49Ti
- T.J. Gray,
- J.M. Allmond,
- C. Benetti,
- C. Wibisono,
- L. Baby,
- A. Gargano,
- T. Miyagi,
- A.O. Macchiavelli,
- A.E. Stuchbery,
- J.L. Wood,
- S. Ajayi,
- J. Aragon,
- B.W. Asher,
- P. Barber,
- S. Bhattacharya,
- R. Boisseau,
- J.M. Christie,
- A.L. Conley,
- P. De Rosa,
- D.T. Dowling,
- C. Esparza,
- J. Gibbons,
- K. Hanselman,
- J.D. Holt,
- S. Lopez-Caceres,
- E. Lopez Saavedra,
- G.W. McCann,
- A. Morelock,
- B. Kelly,
- T.T. King,
- B.C. Rasco,
- V. Sitaraman,
- S.L. Tabor,
- E. Temanson,
- V. Tripathi,
- I. Wiedenhöver,
- R.B. Yadav
Affiliations
- T.J. Gray
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA; Department of Physics and Astronomy, University of Tennessee, Knoxville, TN, 37966, USA; Corresponding author.
- J.M. Allmond
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
- C. Benetti
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
- C. Wibisono
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
- L. Baby
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
- A. Gargano
- Istituto Nazionale di Fisica Nucleare, Complesso Universitario di Monte S. Angelo, Via Cintia, I-80126, Napoli, Italy
- T. Miyagi
- Department of Physics, Technische Universität Darmstadt, Darmstadt, Germany; ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany; Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117, Heidelberg, Germany
- A.O. Macchiavelli
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
- A.E. Stuchbery
- Department of Nuclear Physics and Accelerator Applications, Research School of Physics, Australian National University, Canberra, ACT, 2601, Australia
- J.L. Wood
- School of Physics, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- S. Ajayi
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
- J. Aragon
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
- B.W. Asher
- Department of Physics and Astronomy, University of Tennessee, Knoxville, TN, 37966, USA
- P. Barber
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
- S. Bhattacharya
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
- R. Boisseau
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
- J.M. Christie
- Department of Physics and Astronomy, University of Tennessee, Knoxville, TN, 37966, USA
- A.L. Conley
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
- P. De Rosa
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
- D.T. Dowling
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
- C. Esparza
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
- J. Gibbons
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
- K. Hanselman
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
- J.D. Holt
- TRIUMF, 4004 Wesbrook Mall, Vancouver, BC, V6T 2A3, Canada; Department of Physics, McGill University, Montréal, QC, H3A 2T8, Canada
- S. Lopez-Caceres
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA, 70803, USA
- E. Lopez Saavedra
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
- G.W. McCann
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
- A. Morelock
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
- B. Kelly
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
- T.T. King
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
- B.C. Rasco
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
- V. Sitaraman
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
- S.L. Tabor
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
- E. Temanson
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
- V. Tripathi
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
- I. Wiedenhöver
- Department of Physics, Florida State University, Tallahassee, FL, 32306, USA
- R.B. Yadav
- Department of Biological and Physical Sciences, South Carolina State University, Orangeburg, SC, 29117, USA
- Journal volume & issue
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Vol. 855
p. 138856
Abstract
Single-step Coulomb excitation of 46,48,49,50Ti is presented. A complete set of E2 matrix elements for the quintuplet of states in 49Ti, centred on the 2+ core excitation, was measured for the first time. A total of nine E2 matrix elements are reported, four of which were previously unknown. 2249Ti27 shows a 20% quenching in electric quadrupole transition strength as compared to its semi-magic 2250Ti28 neighbour. This 20% quenching, while empirically unprecedented, can be explained with a remarkably simple two-state mixing model, which is also consistent with other ground-state properties such as the magnetic dipole moment and electric quadrupole moment. A connection to nucleon transfer data and the quenching of single-particle strength is also demonstrated. The simplicity of the 49Ti-50Ti pair (i.e., approximate single-j 0f7/2 valence space and isolation of yrast states from non-yrast states) provides a unique opportunity to disentangle otherwise competing effects in the ground-state properties of atomic nuclei, the emergence of collectivity, and the role of proton-neutron interactions.
